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Fluoride‐Free Synthesis of Two‐Dimensional Titanium Carbide (MXene) Using A Binary Aqueous System
Author(s) -
Yang Sheng,
Zhang Panpan,
Wang Faxing,
Ricciardulli Antonio Gaetano,
Lohe Martin R.,
Blom Paul W. M.,
Feng Xinliang
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201809662
Subject(s) - materials science , dissolution , titanium , fluoride , titanium carbide , ammonium fluoride , mxenes , aqueous solution , aluminium , carbide , ammonium hydroxide , chemical engineering , inorganic chemistry , nanotechnology , metallurgy , chemistry , organic chemistry , engineering
Two‐dimensional (2D) titanium carbide (Ti 3 C 2 ) is emerging as an important member of the MXene family. However, fluoride‐based synthetic procedures remain an impediment to the practical applications of this promising class of materials. Here we demonstrate an efficient fluoride‐free etching method based on the anodic corrosion of titanium aluminium carbide (Ti 3 AlC 2 ) in a binary aqueous electrolyte. The dissolution of aluminium followed by in situ intercalation of ammonium hydroxide results in the extraction of carbide flakes (Ti 3 C 2 T x , T=O, OH) with sizes up to 18.6 μm and high yield (over 90 %) of mono‐ and bilayers. All‐solid‐state supercapacitor based on exfoliated sheets exhibits high areal and volumetric capacitances of 220 mF cm −2 and 439 F cm −3 , respectively, at a scan rate of 10 mV s −1 , superior to those of LiF/HCl‐etched MXenes. Our strategy paves a safe way to the scalable synthesis and application of MXene materials.